package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    // 分页获取员工列表
    @Override
    public PageResult getEmpList(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> empPage = employeeMapper.selectEmpList(employeePageQueryDTO.getName());
        List<Employee> empList = empPage.getResult();
        log.debug("empList: {}", empList);
        return new PageResult(empPage.getTotal(), empList);
    }

    @Override
    public void addEmployee(EmployeeDTO employeeDTO) {
        // 判断用户名是否存在
        // 复制属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        // 补全属性
        employee.setStatus(1);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        // 完善新增功能
        // 通过线程局部边量获取员工id
        Long empId = BaseContext.getCurrentId();
        log.info("currentEmpId: {}", empId);
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);

        employeeMapper.insertEmployee(employee);
    }

    // 启用/禁用用户
    @Override
    public void changeEmpStatus(Integer status, Long id) {
        Employee emp = Employee.builder().id(id).status(status).updateTime(LocalDateTime.now()).build();

        employeeMapper.updateEmp(emp);
    }

    // 根据Id查询员工
    @Override
    public Employee selectEmpById(Integer id) {
        Employee employee = employeeMapper.selectEmpById(id);

        return employee;
    }

    // 修改员工信息
    @Override
    public void updateEmpInfo(EmployeeDTO employeeDTO) {
        Employee empInfo = new Employee();
        BeanUtils.copyProperties(employeeDTO, empInfo);

        employeeMapper.updateEmp(empInfo);
    }

    @Override
    public void changePassword(PasswordEditDTO passwordEditDTO) {
         passwordEditDTO.setOldPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()));
         passwordEditDTO.setEmpId(BaseContext.getCurrentId());
         employeeMapper.updatePassword(passwordEditDTO);
    }
}
